Strymon Riverside Multistage Drive: The Preamp That Refuses to Be a Pedal

There is a question that has followed the Strymon Riverside since the day it landed in November 2016, and it is the wrong question. The question is: what does it clone? Players wanted to know whether it was a Tube Screamer, a Klon, a Plexi, a Rectifier. Strymon eventually published a blog post with the exasperated title Can Riverside replace my ______? because they were being asked it so often. The honest answer, then and now, is that the Riverside does not clone anything, and the reason it does not clone anything is that it is not really built like a drive pedal at all. It is built like the front half of a high-gain amplifier that somebody folded into a four-and-a-half-inch enclosure and gave a Favorite switch.

That distinction sounds like marketing until you look at the circuit. Almost every overdrive and distortion pedal ever made achieves its gain in one stage — an op-amp or a transistor, cranked up, with diodes doing the clipping either in the feedback loop or shunted to ground. The Riverside uses four gain stages in series. The first is a real, discrete, Class A JFET circuit on the board, capable of adding up to 20dB of analogue gain. The next three are DSP stages built around the asymmetric clipping behaviour of preamp vacuum tubes. That is the architecture of a hot-rodded amp preamp, not of a stompbox, and it is why the Riverside feels different under the hands from anything sitting next to it on a pedalboard.

Nine years on, at $299 and still in current production while several of its 2016 contemporaries have quietly disappeared, the Riverside has settled into a strange and durable niche: the drive pedal that people buy when they have already bought all the other drive pedals.

Where the Riverside Came From

Strymon’s Drive Problem

By 2016 Strymon — a division of Damage Control Engineering, operating out of Westlake Village, California — had comprehensively solved time-based effects. The TimeLine and BigSky were the default professional delay and reverb boxes. The El Capistan, Flint, Deco and Mobius covered the rest of the modulation and echo territory. What the company had never done was gain.

This was not an oversight. Drive is the hardest category in which to make a digital argument. Nobody has ever accused a delay pedal of failing to be a delay pedal, but the guitar world has a long, loud, and not entirely unreasonable prejudice that says distortion must be analogue. Strymon’s answer, when it finally arrived, was to refuse the premise and build a hybrid: keep the part that players actually feel in their hands — the input stage — in real analogue silicon, and put the DSP where it could do something no analogue circuit can practically do.

Riverside became available to buy in November 2016. Sunset Dual Overdrive, its stablemate and near-opposite, followed a few months later. The two pedals were deliberately designed as a pair covering opposite philosophies, and in March 2017 Strymon co-founder and DSP engineer Pete Celi published a white paper explaining exactly why.

The White Paper That Explains Everything

Celi’s paper, Single Stage and Multistage Gain Topologies, is the single most useful document ever published about this pedal, and it is worth understanding because it tells you what the Riverside will and will not do before you plug it in.

Celi lays out the standard vocabulary. A boost uses a JFET for high input impedance and mild breakup, roughly 20dB of gain. A soft clipper — the classic overdrive topology, diodes in the feedback path — runs 40 to 50dB and preserves your input transients, so digging in creates harmonics without creating volume. A hard clipper — diodes to ground at the output, the distortion-pedal approach — runs 60 to 70dB and responds to harder picking by generating more harmonics rather than passing the peak through. A two-stage circuit combines a soft clipper feeding a hard clipper through a network, one gain stage but two clipping stages. Sunset offers six of these topologies, selectable and stackable.

Then Celi describes what happens in an amplifier instead. Preamp tubes have far less gain than an op-amp, so high-gain amp designers cascade several low-gain stages in series. Each stage inverts polarity. Each stage clips asymmetrically, meaning one half of the waveform gets flattened harder than the other. The interstage resistor-capacitor networks between them determine frequency response and level going into the next stage. The result is a harmonic structure that keeps changing as individual stages enter and leave clipping, and a set of bias points that shift in response to picking transients and note decay. It is a fundamentally different feel from either a soft or a hard clipper, and it is the sound most people mean when they say “amp.”

Riverside implements that structure directly: four cascading stages, the first analogue JFET, the following three modelled on asymmetric preamp tube clipping. Asked in the comments on that very white paper whether the Riverside should really be compared with other overdrive pedals, Strymon’s Hugo agreed that it would fit better in comparisons with other preamps. That is a remarkable thing for a manufacturer to concede about its own drive pedal, and it is the truest single sentence written about the Riverside by anyone.

How It Actually Works

Continuously Variable Circuit Tuning

The Drive knob on a normal overdrive changes one thing: how hard the gain stage is driven. Everything else in the circuit — the filters, the interstage networks, the bias points — is fixed at whatever value the designer chose, which means the pedal has one sweet spot and the rest of the sweep is a compromise on either side of it.

Riverside’s Drive knob adjusts many parameters simultaneously. As you turn it, the values of the interstage circuitry between the four gain stages are retuned continuously so that the pedal stays optimally voiced at every point. Strymon’s phrase for this is “infinite sweet spot,” which is a marketing line describing a real engineering decision. The practical consequence is that the Riverside does not have a magic setting. It has a usable, coherent, deliberately voiced tone across the entire rotation, from an almost-clean push to genuinely heavy saturation, and it does not get thin at the bottom of the sweep or fizzy at the top the way a fixed-network circuit does.

This is also, incidentally, the thing that makes the Riverside slightly frustrating for players who want to A/B it against a Tube Screamer. There is no equivalent setting. The pedals are not doing comparable things.

Gain, Push, and the Two-Channel Trick

Two small toggle switches turn the Riverside from one drive into four voicings. Gain selects between Low and High channels. Low gives a wide range from clean to medium, and at maximum Drive it goes heavily overdriven with a deliberate looseness — the behaviour of a vintage amp with everything dimed. High raises gain throughout the signal path and tightens the response, staying relatively clean at low Drive and reaching saturated distortion at maximum. That tightening is the important part. It is not simply more gain; it is a different low-end filter philosophy, the same trade-off amp designers make on a high-gain channel.

Push selects Norm or Mid. Mid inserts a mid-band EQ boost immediately after the analogue front-end gain, which drives all the subsequent stages harder and tightens the response further. Guitar.com’s review noted that flicking it down adds a hearty helping of extra gain with the emphasis on chunky mids while still sounding completely natural — and, pointedly, not sounding digital. Norm is the transparent, cleaner option.

Between those two switches you have four distinct starting points, and because the Favorite footswitch stores a complete snapshot of every knob and switch position, you effectively get two fully independent channels underfoot. MusicRadar’s review made exactly this point: two fully independent dirt channels plus a clean boost, in one enclosure.

The EQ, and Why It Is Post-Drive

Bass, Middle and Treble are all active and all sit after the drive stages. This is a deliberate departure from tube-amp convention, where the tone stack usually sits between preamp stages. Putting it post-drive means the EQ shapes the finished distorted signal on its way to your amp rather than changing what gets distorted, which makes it far more effective as a matching tool. Bass is an active shelving/parametric low control, Middle is a parametric boost and cut with an optimised centre frequency, Treble is a wide-ranging active high shelf.

Behind that sits the three-position Presence switch on the rear panel, which tailors the very top end. Minus gives controlled top for bright amps. The centre Enhanced position extends the top for more sizzle on high-gain sounds. Plus adds extended high-end detail for dark amps, and is the setting to use when going straight into a power amp or a load box.

Taken together, the EQ and Presence are why the Riverside can be moved between amps and still work. This matters more than it sounds. A great many boutique drives are voiced around one amp and fall apart in front of a different one; the Riverside’s entire tone-shaping section exists to prevent that.

The Small Things That Justify the Price

Riverside includes a variable-threshold Noise Reduction circuit — a downward expander with signal-detection logic designed to transition seamlessly to silence rather than gating abruptly. On a high-gain patch with single coils, it is genuinely useful, and it is not a feature most drive pedals have at all.

There is a Boost jack that takes an external footswitch for up to +6dB of post-boost, and which can alternatively be run to the EXP input of another Strymon pedal so that Riverside’s Favorite switch triggers the Favorite setting on both boxes simultaneously — useful if you are running it alongside a blueSky or a TimeLine. An expression pedal input gives continuous foot control over any or all knobs, in any direction, or acts as a volume control. And from firmware version 1.2 onward, the Riverside accepts full MIDI control, which is the feature that puts it on switching-system boards where analogue drives simply cannot go.

Bypass is electro-mechanical relay true bypass, which means — as with the rest of the current Strymon line — there is no battery operation and no signal at all without power.

Specifications

Famous Players: What Actually Holds Up

This is the section where the Riverside requires some honesty, because it is not a pedal with a mythology. It has no signature artist, no origin story involving a famous player’s broken vintage box, and no single record that people point to as the Riverside album. What it has instead is a scattered, verifiable set of working professionals who bought one because it solved a problem. That is a less glamorous story and a more useful one.

James Walbourne (Pretenders) — magazine-verified

The strongest documented user, and the one whose reasoning is most instructive. Speaking to Guitar.com for their The Collection feature, the Pretenders guitarist explained that he tries to use as few pedals as possible: he wants something to break the sound up a little, likes the Z.Vex Box of Rock for that, and then keeps the Strymon Riverside for something one louder than that. His stated reason for the Strymon is the one that comes up over and over from touring players — you can programme it all in there, and every night it is the same sound.

That is the Riverside’s actual pitch, stripped of engineering language. On a board where every other box has to be re-dialled after a rough flight, the Riverside recalls its Favorite setting exactly, every night, in every room. For a guitarist in a band with a fifty-year catalogue and a fixed set of tones to hit, that is worth $299 on its own.

Scott McMicken (Dr. Dog) — Premier Guitar Rig Rundown

Dr. Dog’s Rig Rundown documents a Riverside on McMicken’s board, custom-painted silver so it matched the rest of his rig. It is a small detail, but a painted-over pedal is a strong signal: nobody bothers to refinish a box they are auditioning.

Jason Richardson — player statement, video-sourced

The virtuoso guitarist, known for his work with Chelsea Grin and All That Remains as well as his solo instrumental records, has been documented using a Riverside and describing it as the main source of his distortion tone in that context. This is a genuinely surprising placement — the Riverside is not usually filed under modern metal — and it says something about how far the High/Mid configuration actually goes. If you have dismissed the pedal as a blues-rock box, that dismissal is not supported by the evidence.

Crowd-sourced sightings, flagged as such

Equipboard additionally lists, with photo or video attached, Richard On of O.A.R. (Instagram board photo), Armistead Burwell Smith IV of Pinback (2017 board photo posted by a touring tech), singer-songwriter Lewis Watson, guitarist and broadcaster Tyler Larson, Norwegian guitarist Benjamin Nerheim of Heave Blood & Die (board photo dated 28 September 2020), guitarist and singer Andrea Benz — who has said on video that she is extremely picky about overdrives and rates this one — and, unexpectedly, electronic producer Paul Kalkbrenner, using one at Tomorrowland in 2016. These are crowd-sourced entries. Treat them as sightings rather than as documented rig history.

The honest summary

None of the players above is in a position to sell you a Riverside on reputation, and none of them is a name that GuitarGangsters has covered in a dedicated guitarist feature. The amp-in-a-box tones the Riverside is chasing belong to players like Angus Young, James Hetfield, Joe Bonamassa and Billy Gibbons — none of whom, to be clear, are documented Riverside users. They are reference points for the sound, not endorsements of the box. If a retailer tells you otherwise, they are inventing it.

Tone Recipes

All settings assume a reasonably clean amp and a humbucker-equipped guitar unless stated otherwise. Clock positions are approximate; the point is the relationship between the controls, not the exact degree.

Comparisons

Riverside vs the classic overdrives

Against a TS9 or TS808, the Riverside is not competing. The Tube Screamer is a mid-humped soft clipper designed to push an amp; it is a flavour, and the flavour is the point. The Riverside is a preamp that generates its own amp-like distortion. If your amp already sounds right and you want to shove it, buy the Screamer. If your amp is clean and you need it to become a different amp, the Screamer will not get you there and the Riverside will.

The same logic applies to a Klon-style circuit or a BD-2 Blues Driver. Those are transparent-ish boosts with character. The Riverside is a tone generator.

Riverside vs the amp-in-a-box pedals

This is the fair fight. A Wampler Plexi-Drive Deluxe or a JHS Angry Charlie aims at one specific amp and hits it hard. The Riverside aims at the behaviour of a cascading tube preamp in general and lets you steer the voicing with EQ, Push and Presence. You give up the specificity — the Riverside will never be a JCM800 in the way that a purpose-built Marshall-in-a-box is — and you gain range, recallable presets, MIDI, and an EQ that lets it work in front of a Marshall DSL, a Fender-voiced clean amp, or a modeller.

Riverside vs the modern preamp pedals

The category the Riverside really belongs to did not exist properly in 2016 and does now. A Friedman IR-X uses real 12AX7s and includes cab IRs. A UAFX Enigmatic ’82 or Ruby ’63 models a specific amp end-to-end and provides speakers. A JHS Clover takes an entirely different, console-preamp approach.

The Riverside’s position among them is deliberate: no cab simulation, no amp-specific modelling, no tubes. It is only the gain structure, which means it wants to go into a real amp or into a separate cab sim rather than being a complete rig on its own. Whether that is a limitation or a feature depends on whether you already own an amp you like.

Riverside vs Sunset

The one comparison Strymon actively encourages. Sunset gives you six classic single-stage pedal topologies, two stackable at once — the JFET boost, the treble boost, the Texas soft clipper, the germanium parallel-path clipper, the hard clipper, the two-stage. It is a box of familiar pedal sounds. Riverside is a box of amp sounds. Owning both is not redundant, and Strymon’s staff have publicly recommended running Sunset into Riverside for exactly that reason.

Buying Guide

New, direct from Strymon, the Riverside is $299 and listed as in stock with same-or-next-business-day shipping as of September 2026 — a decade after launch, which in the pedal industry is close to remarkable. Used prices have settled around $190–230, which makes a second-hand Riverside one of the better value propositions in the boutique drive market, largely because the pedal’s reputation for being complicated has suppressed its resale price relative to how good it is.

Check the firmware. MIDI control arrived in version 1.2. A used unit from 2016 or early 2017 may be on earlier firmware. This is updatable by the owner via the Strymon Nixie utility, so it is not a reason to reject a pedal, but it is a reason to check before you build a MIDI board around one.

Check the power situation. 250mA minimum at 9VDC centre-negative. This is not a pedal that will run off a spare output on a cheap daisy chain, and it will not run on a battery at all. If your supply is marginal, budget for an Ojai- or Zuma-class isolated supply at the same time.

Buy it for the right reason. If you want the Riverside to replace a specific pedal you already love, you will probably be disappointed — that is the exact question Strymon wrote a blog post to answer, and their answer amounted to no, it does something else. Buy it because you want amp-style cascading gain from a clean amp, or because you need two recallable, road-stable drive channels in one enclosure, or because you are running into a modeller or a desk and want a real analogue front end doing the first 20dB.

Ownership Notes

The relay true bypass means no battery operation and no signal path without power — if the pedal loses power mid-set, the signal stops, so a reliable supply is not optional. The enclosure is the standard Strymon medium format at 4.5″ x 4.0″ x 1.75″, which is wider than a Boss compact and will affect board planning, particularly if you are also running a Cloudburst or two other Strymon boxes.

Storing a Favorite is a press-and-hold on the Favorite switch. Secondary functions — Noise Reduction threshold and Boost Level — are accessed by pressing and holding the ON footswitch, releasing, and then turning the relevant knob. This is not discoverable and it is worth reading the manual once rather than guessing.

The pedal is built in the USA and Strymon’s support and firmware history on it is unusually long-lived; a 2016 unit can still be brought fully up to date. That is part of what the $299 buys.

Frequently Asked Questions